lower left on tab: (butterfly monogram) imp.
- Bruxelles carrefour de cultures, palais des Beaux-Arts de Bruxelles, 2000, not reproduced in the exhibition catalogue.
- Kennedy, Edward G. The etched work of Whistler, illustrated by reproductions in collotype of the different states of the plates. 6 vols. New York: Grolier Club, 1910.